Finding the Third Proportional to 197,811 and 310,081.50

Step by Step Solution

1. Step 1: Write the proportion equation
   197,811 : 310,081.50 = 310,081.50 : x
2. Step 2: Convert to fraction form
   197,811/310,081.50 = 310,081.50/x
3. Step 3: Cross multiply
   197,811x = 310,081.50 × 310,081.50
4. Step 4: Simplify right side
   197,811x = 96,150,536,642.25
5. Step 5: Solve for x
   x = 96,150,536,642.25/197,811
6. Step 6: Final answer
   x = 486,072.75